<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="Content-Type" content="text/html"/>
    <title>WebSocket客户端</title>
    <script type="text/javascript">
        var socket;
        if (!window.WebSocket){
            window.WebSocket = window.MozWebSocket;
        }
        if (window.WebSocket){
            socket = new WebSocket("ws://localhost:8888/websocket");
            socket.onmessage = function (event) {
                var ta = document.getElementById('responseContent');
                ta.value += event.data + "\r\n";
            }
            socket.onopen = function (event) {
                var ta = document.getElementById('responseContent');
                ta.value = "您当前的浏览器支持WebSocket，请进行后续操作\r\n";
            }
            socket.onclose = function (event) {
                var ta =  document.getElementById('responseContent');
                ta.value = "";
                ta.value = "WebSocket链接已经关闭\r\n";
            }
        } else {
            alert("您的浏览器不支持WebSocket!")
        }

        function send(message) {
            if (!window.WebSocket){
                return;
            }
            if (socket.readyState == WebSocket.OPEN){
                socket.send(message);
            }else {
                alert("WebSocket连接没有建立成功！！！");
            }
        }

    </script>

</head>
<body>
    <form onsubmit="return false;">
        <input type="text" name="message" value=""/>
        <br/><br/>
        <input type="button" value="发送WebSocket请求消息"
        onclick="send(this.form.message.value)"/>
        <hr color="red"/>
        <h2>客户端接收到服务端返回的应答消息</h2>
        <textarea id="responseContent" style="width: 1024px; height: 300px"> </textarea>
    </form>
</body>
</html>